Rename to mbed TLS in the documentation/comments
diff --git a/library/cipher.c b/library/cipher.c
index b11ecf0..7f43875 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -1,7 +1,7 @@
 /**
  * \file cipher.c
  *
- * \brief Generic cipher wrapper for PolarSSL
+ * \brief Generic cipher wrapper for mbed TLS
  *
  * \author Adriaan de Jong <dejong@fox-it.com>
  *